The first two debunk the "shoot-down order" without adding any evidence of it really existing on AA77 (we know there was a shoot down order for UA93, the fourth plane, but the plane had already crashed as it was issued).
But facts tell us the plane was not shot down, and that jetfighters scrambled from Langley at 9:30, seven minutes before the hit, so there would have been time (even at half speed) to shoot it down if the order was indeed that one.

But it's not so important at this point, as they don't assess the incongruences between Mineta deposition and 9/11 commission report.

The third is more interesting because it tries to establish a timeline:

There is conflicting evidence about when the Vice President arrived in the shelter conference room. The 9/11 Commission concluded, from the available evidence, that the Vice President arrived in the room shortly before 10:00, perhaps at 9:58.
http://www.debunk911myths.org/topics/Norman_Mineta

Those are about the exact words of the 9/11 commission report:

There is conflicting evidence about when the Vice President arrived in the shelter conference room. We have concluded, from the available evidence, that the Vice President arrived in the room shortly before 10:00, perhaps at 9:58.
http://www.9-11commission.gov/report/911Report_Ch1.htm

So, let's see Mineta deposition, again:

MR. MINETA: No, I was not. I was made aware of it during the time that the airplane coming into the Pentagon. There was a young man who had come in and said to the vice president, "The plane is 50 miles out. The plane is 30 miles out." And when it got down to, "The plane is 10 miles out," the young man also said to the vice president, "Do the orders still stand?" And the vice president turned and whipped his neck around and said, "Of course the orders still stand. Have you heard anything to the contrary?" Well, at the time I didn't know what all that meant. And --

MR. HAMILTON: The flight you're referring to is the --

MR. MINETA: The flight that came into the Pentagon.

MR. HAMILTON: The Pentagon, yeah.
http://www.9-11commission.gov/archiv...2003-05-23.htm

See the link? 9-11 commission dot gov again. Just the opposite of what got on paper on 9/11 commission report.

So?